Cold-Formed High-Torque Screw Shaft | Involute Spline for Twin Screw Extruders
Next-generation high-torque shaft engineered through cold forming technology for maximum strength, fatigue resistance and long-term reliability.
Cold-formed high-torque screw shafts represent the most advanced manufacturing approach for involute spline shafts in twin screw extrusion systems.
Unlike machining, the cold forming process plastically deforms the material to create the spline geometry, preserving continuous grain flow along the tooth profile. This results in a refined microstructure with enhanced mechanical strength and significantly improved fatigue resistance.
The process also induces surface work hardening, increasing hardness and resistance to wear and micro-crack initiation. These characteristics enable reliable torque transmission under extreme cyclic loading and peak torque conditions.
This technology is essential for modern high-torque extrusion systems, where performance limits are defined not only by geometry but by material behavior under load.
Higher surface hardness
Reduced notch sensitivity
Improved fatigue life
Diameter | Ø10-200mm |
Length | 1000～15000mm |
L/D Ratio | 1~64D |
Involute Standard | DIN 5480/ GB/T 3478/ANSI B92.1/ISO 4156/JIS B 1602 |
Spline Type | Single key / Rectangular Spline / Hexagonal / involute spline / Customized |
Spline Modulus | 1.5 / 2.0 / 2.5 / 3.0 / 4.0 |
Material | A40/A70/A80/Stainless |
Tensile Strength | ≥900 MPa |
Yield Strength | ≥700 MPa |
Torque Capacity(Max) | 5～18 |
A: It enhances material strength and fatigue resistance through grain structure refinement and work hardening.
A: In high torque, high load and long-cycle production environments.
A: Yes, significantly—especially under cyclic and peak load conditions.
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